Definition of corpus callosum in US English:

corpus callosum

nounPlural corpora callosa

Anatomy
  • A broad band of nerve fibers joining the two hemispheres of the brain.

    • ‘In this preparation the corpus callosum, caudate nucleus, and most brainstem structures have been removed.’
    • ‘The mass extended into the left hemisphere through the anterior corpus callosum and obliterated the frontal horn of the right lateral ventricle.’
    • ‘The great cerebral vein can be seen curving below the splenium of the corpus callosum to empty into the straight sinus.’
    • ‘In addition, in murderers' brains, the corpus callosum - a band of tissue that links the right and left hemispheres - also functioned poorly.’
    • ‘In the depths of the specimen it is possible to see the inferior surface of the corpus callosum, to which the body of the fornix is firmly attached.’

Origin

Early 18th century: from corpus and Latin callosum, neuter of callosus ‘tough’.

Pronunciation

corpus callosum

/ˌkôrpəs kəˈlōsəm/